Pressure cooker



Oct. 6, 1953 Filed March 2l, 1950 P. ANTONIOLI, JR., ET AL PRESSURECOOKER 3 Sheets-Sheet l Oct. 6, 1953 P. ANTONIOLI, JRV., ET AL PRESSURECOOKER 3 Sheets-Sheet 2 Filed March 2l, 1950 Oct. 6, 1953 P. ANToNloLl,JR., ET AL 2,654,501

PRESSURE cooxER Filed March 2l, 1950 3 Sheets-Sheet 5 Patented` ct. 6',19513 UNITED STATES PATENT oFFIcE PRESSURE COOKER Peter Antonioli, Jr.,and Andrew Johnson, Butte, Mont.

Application March 21, 1950, Serial N o. 150,878 4 claims. (C1. 22o-20.5)

This invention relates pressure cookers.

The invention has forran object to provide a novel construction ofpressure cooker having means whereby material can be introduced into theinterior thereof during its use ina cooking operation withoutinterrupting such operation, and in such manner that appreciable loss ofheat and internal steam pressure is avoided; all whereby quick cookingmaterial can be added to slow cooking material after desired cookingprogress of the latter material has been attained.

The invention has for a further object .to provide in cooperativerelation to the main body compartment or chamber of a pressure cookerl asecond compartment or chamber to which access can be had Withoutopeningthe main compartment or chamber; lmanipulatab'le means beingprovided for opening and closing .communication between said secondkcompartment or chamber and the main compartment or chamber for transferof materialfrom the former to the latter; and manipulatable valve meansbeing provided for opening and closing steam communication between themain compartment or chamber and said second compartment or chamber atwill.

Other objects and advantages of the invention will become apparent asthe following specification is read in connection with the accompanyingdrawings, in which:

Fig. 1 is a vertical longitudinal sectional View of a pressure cookerillustrating one embodiment of .the present invention; and Fig. 2 is ahorizontal sectional view of the same, taken on line 2 2 in Fig. 1.

to improvements in Fig. 3 is a fragmentary vertical longitudinalwsectional view of a pressure cooker illustrating another embodimentofthe presentinvention.

Fig. 4 is a fragmentary vertical longitudinal sectional view of apressure cooker illustrating still another embodiment of the presentinvention.

manipulating the same.

Fig. '7 is a fragmentary sectional view ofv a modified construction ofthe gate plate of the pressure cooker; and Fig. 8 is also a fragmentarysectional view of another modified form and arrangement of gate plate ascooperative with a chute structure disposed between theA secondcompartment or chamber and the main body compartment or chamber ofuapressure cooker according to this invention.

Similar characters of in the above described spending parts.`

In Figs. 1 and 2, the illustrative embodiment of this invention thereinshown comprises an upwardly open main body I0, the interior of whichprovides the main compartment or chamber II of the pressure cooker. 'Iheopen top of the main body IIJ is adapted to be closed by a detachablecover I2. Said main body I0 and cover I2 are respectively provided withcooperative interlocking lugs I3 and I4, whereby, in cooperation with asealing gasket I5, to releasably secure the cover and the body togetherin leak-proof closed reference are employed views, to indicate correwardpressure caused by steam generation, which is an essential requirementin pressure cooker construction. Cover I2 may thus be termed brieiiy ascalable cover, which means that it is removable or openable but hasassociated structural means of some suitable and well known type forsecuring it to body I0 in a pressure-resistant, hermetically sealedmanner when in applied position. The cover I2 is provided with asuitable safety and pressur relief valve device 52 of any well knowntype.

The body I 0 and cover I 2 are preferably respectively provided .witlihandle extensions I 6 and I l,

The cover I2 is provided with an opening or hatchway I8. Upstandingfromthe cover I2, in axially aligned relation to the opening or hatchway I8,is an endwise open auxiliary body I9, the interior of which provides asecond compartment or chamber 20, which for convenience indistinguishing the same from the main compartment or chamber II, ishereinafter referred to as the induction chamber. Said auxiliary body I9 may be formed as an integral part of the cover I2, but preferably isarranged to be a separable adapted to be closed by a detachable,scalable the under sideof By pushing the actuating irig 'communication'between the the auxiliary.V

"transverse ports 41 ilation one to the Mounted within the cover I2 is agate platea] which can be manipulated to open and close the Y opening orhatchvvay I8, andthusto bp'nfjand close communication between chamberand of the main body IB of the pressure cooker.

the form and arrangement thereof which 1is in Figs. l and 2, said gateplate 3| isA slidably supported, by 'diametric lly disposed al"doppo'sitely extending runner lugs 32, Vupon rail ledig'eslm which areprovided in connection -with the `'1n- 'tern'al or underside ofthemainbover erably thes'e A`rail ledges 3% faire inclined in theirlappro'a `h t'o the I'opening or hatchway IB whereby, as the Agate platey'31|' Vis lrnoved yinto register with 'and so as to close the openingor Herenweg it, the seme will 'be .pressed upwsrdiyjrowaro andinsorti-ghi ment withr an -annular sealing which the interior fo'f thevcover sealing engagegaskei 34 with I2 is provided 'in surroiindingrelation rto l:said opening or 'hatch- 'Way I8.

ishown in Figs.v lY and 2, l'comprises 1a slidable .actuating rod 35,'to the inner end -o'f 'which lthe gate plate is 'li'tajbly bnzictedfa's`gpy acros's-pin 36 supported Abyears )31 "depending from the gateplate. The u'te'r por-A tion of the Vactuating rod '35 kprojectsl"ext'eriorly rointhe cover |'2 through a'p'acked stuffing bex 3'8.

Afxed to the outer extremity -o' the act winne obvious thatwneriumgforceis afpplied to 'the actuating rod 3'5, theigatefplate 'will b'casfed'to slide `l`1 therail edges '33 away from the opening orhatchway 1TB, v'thus 'opening `com- 'fr'iuiiicatiou oetw'eeri irreinduction 'chamber 'zo and the dialin 1by olnpaitnfent'dr 'chamber I I.r'od inward, the gate p'ia'te be returned i'oitsfcioseu and sealedlation to the o'pnin'g'or hatchw'ay'I-S, thus closinduction chamloer lzo-und die rrfain body 'compartment-*or 4chambe'r AI I.

. Another rnaris 'forlnanipulatin'g the gateplate 3| is Slbvv'l. 'in 3,'a "d'COmpI'SeQS'a rotatable aetuaririgjsna'ft 4u havin-g escrew-threaded seo- M" n4I .atits inner lpo'rtion 'vvli'cll'l iSthreaded rhr'oughen internally screw-threaded iugnz that projects lfromtli'e underside 'Of thgat plate 3|. The outer eniportion oi 'shari "4uis iourriaieiiin va packed bearing '43 'with which the 'cover I2 isprovided. The actuating shaft'is 'retain'dfagainst axial movement byvinner and outer 'collars l44 and '44" 'which ares'utably affixedthereto. Secured on' the4 outer extremity of'lthe actuating Shaft '40 isa hand-Wheel 45 bAWlCh it hailfbe rotated. By rotating the actuatinglsloalt'in one direction, the

for manipulating the gaie prete 13| ating rou 'is e. handle la9 -o'isuirablefdesi'gii. I rt the upper plate to closed and sealed relation tothe opening or hatchway I8.

Means is provided for opening and closing steam communication betweenthe main body compartment or chamber II and the induction chamber 20.One means for this purpose, as shown in Figs. l and 2,',comprises a twoway valve l "mounted in the portion of the cover l2. This vsive'devi'ceycomprises s rotatable tapered valve plug 4B having spaced and 4Bdisposed in right another. Provided in the I2 is a steam flow duct n isaligned. 'The lower end of duct 49 communicates with chamber II at apoint belowl the gate plate 3|, and the upper end of dctil!ommunicatesvvith the induction chamber 20 above the gate plate 3|.Leading from -end portion' of' duct im a branch duct with which thevalve :plug port d8 lis rim portion yof vthe cover fmuii'icaies 'withtlreiilfduetion ori-amber 2U., fand tothe the frimportioii `or the covert -itesfwiintrfeatmosphere. `lelflix'ed to iene-#outer endo'f valve plugat a. iinger piece 5I by which inesame .be irrea- =b1ite`r periphery of4nipulfated.

- 'in the use of the pressure eooker of this iaventi'on, assuming" ithat'materiali lsu'ch 1' a's tslo'vv cooking rood, is unile" goingtire'f'eeol'rlin'g-'operation 'wit-,hin fthe' maieoi'iipar 'rife t oronaiber H, and that-diie fgateipiaiiesl s1 eiosezifeied sealedrelationftotir induotinicrfamberzt; rai-1d is turned 'to close the steamoiied to 'rire pressure cooker will ireveiop ste-sin ,a rireeorripariini 'rit ror chanter i l so thatl irre 'coo therein be inprogress. VAssur-nine 'that `pires-sure A'within irre of the rn ieriaicontained ii 'is desiree io introduce additional materia-into "thecompartiment for chamber fI-I without firmerruntime the cookingiorfeiriA-.iori i j 'eiiaihjber il, y y ,Y closed position andthe verve'one l and seal 'sei'i induction 'oir-amber progresstherein.VVTo'aocoiripiishtlus; tireeover "at foit'he auxiliary body I9 is removed,and the additional fhaferiai "is ueposirjeiiwiihiu tig-e irriiueironeneiuber v`2t, `writererin-.er the "cover fzslis replaced "to Aolo'sel"2l. :The Yvalve plug 46 is thereupon turn'edto "close 'the branch f'duet [tb arid jopeu-tiieduoiiis; inusadmitting from t l l -1 into ure'induction eri-smeer theY compartment or chamber `2 [I "so 'that"Stefani 'sidesfof 'the gate conditions havingben establ i withdrawnTrdin it's closed relati'cn 'to the openli'ig "or "hatchway "I8,thusfcp'e'nngth" latter Tol' the passage "one'rfeilir'ugh oi"iheyajdaedrriaterial frein the "induction charnber"2'0 'intothenifainconipaitine" 't o'' chamber `I`I. After the 'added material isthus deposited within the compartrneritor the'gate'plate 3l isieturnedto its i 46 is *trfned 'to close the du'c'ts' andpen the"branchduct 50, thus venting steam from theindctiohchainplate 3 I. These b'e'rzuio thejatmosoherawaereby pressure within theind'uotionenambersraieved, so trier the .pressure o'f 'steam 'the compartment or''chamber n thrusisgagaiust'the underside 'jof ythe closed gateiplae-aifd'ti-fus ffu'rtii'erfurges the jiauteririto tightseelied engagementwiih'uie'seaiing gasket `3'4.

it may 'be desiree to "'eieeiseparate cooking V of the addedmaterial'tithintheiindiitnchainh 'ber 26, instead of introducing'saidmaterial into the main compartment or chamber II. If so, this may bedone by leaving the gateplate 3| in partially open or cracked positionand manipulating the valve plug 46 to close the branch sation in chamber28 back to main chamber |I. If it is desired to use the main body III`of pressure cooker independently of the auxiliary body the latter can beremoved from the main cover I2, and the auxiliary body cover 25 thenapplied to the latter to close and seal the opening or hatchway I8thereof.

Referring now to Fig. 4 of the drawings, there is shown therein a modiedembodiment of the pressure cooker of this invention, wherein instead ofproviding the steam control valve device in the rim of the cover I 2 asabove described, the steam valve device is incorporated in the gateplate. In this arrangement, the gate plate 3| is provided with a valvehousing boss 53 dependent from its underside. Extending through saidhousing boss 53, for rotation therein, is a tapered valve plug 54 havinga transverse port 55 which is in line with a steam ow duct 56 disposedto extend upwardly through said housing boss 53 and the gate plate 3|,whereby the lower end of said duct communicates with the maincompartment or chamber I|, and the upper end of said duct communicateswith the induction chamber 20. Extending from said valve plug 54 is aslidable and rotatable actuating rod 51. Sliding manipulation of rod 51serves to move the gate plate for opening or closing the same. Rotatablemanipulation of rod 51 serves to turn the valve plug 54 to open andclose the steam flow duct 56. In connection with this arrangement, thecover 25 of the auxiliary body I9 is provided with a suitable safety andpressure relief valve 58 of any well known type. In the use of thismodified embodiment of the invention, to introduce additional materialinto the main compartment or chamber I I, the gate plate 3| being closedand the valve plug 54 disposed to close the duct 56, the cover 25 isremoved and the material to be added is deposited in the inductionchamber 20, whereafter the cover 25 is replaced to close said inductionchamber. The actuating rod 51 is now rotated a quarter turn to registerthe valve plug port 55 with the duct 56, thus admitting steam from themain compartment or chamber into the induction chamber 20, therebyequalizing steam pressure on both sides of the closed gate plate 3|.This having been done, the actuating rod 51 is pulled outwardly to openthe gate plate 3| so that the additional material may pass from theinduction chamber 2|] into the main compartment or chamber whereafterthe gate plate is again closed. After this the relief valve 58 may beopened to vent steam from the induction chamber 2U, so that steampressure in the main compartment or chamber I will further urge the gateplate into tightly sealed engagement with the sealing gasket 34.

It may be desired to provide means for detachably coupling the gateplate 3| to its actuating rod. If so, any suitable coupling means forsuch purpose may be provided. For example, as shown in Fig. 5, theactuating rod 35 of Fig. 1 may be provided with a separable section 35joined to the main section by a coupling or union Jaws' 63 with whlchthe coupling or umon 6|,is

through the coupling or union to the separable section 51', so thatsliding movement Aof said rod will move the gate plate to and fromclosed position, and rotative movement of said rod will turn the valveplug 54 asdesired.

In the above described embodiments of the pressure cooker of thisinvention, the gate plate arrangement; understood however that the gateplate may optionally be provided of hinged or swinging type andarrangement. For example, as shown in Fig. 7, the arrangement comprisesa gate plate 64 having a hinging member 65 pivotally supported by ahinge pin or pintle 66. Provided in connection with the hinged side ofthe gate plate 64 is a bellcrank arm 61 to which the actuating rod 35 isconnected. In this arrangement, the gate plate can be down-swung fromits closed relation to the opening or hatchway I8 to an open position bysuitable manipulation of the actuating rod 35.

In another arrangement shown in Fig. 8, the cover |2 is provided with adownwardly inclined chute section 68 which leads from the opening orhatchway |8. Cooperative with the open free end of said chute section 68is a swingable gate plate 69 which is hinged to the cover I2 at 10. Therim surrounding the open end of the chute section 68 is provided with asealing gasket 1I engageable by the gate plate 69 when the latter isclosed. The actuating rod 35 is pivotally connected at 12 with the gateplate, whereby said rod, when properly manipulated, may be caused toopen and close the gate plate 69.

It Will be understood that various changes and modifications, inaddition to those already pointed out, may be made in the abovedescribed pressure cooker structures without departing from the scope ofthe invention as dei-ined in the following claims. It is thereforeintended that the matter described in the foregoing specification andshown in the accompanying drawings shall be interpreted as illustrativeand not in a limiting sense.

We claim:

1. A portable cooking utensil of the pressure cooker type comprising anupwardly open main body, the interior of which provides a main cookingchamber, a removable main cover adapted ried by said main cover tocooperate with said opening therethrough for opening and closingcommunication between the main body interior 'or operi-positiom. meansto-pi'ovie-, steam tiow icortina'miicafiicri between-.the iiiteifiosofsiidmain removable covei Abeing applicableV to said main and.auxiliary bodiesf-and; alrvlve means cooperaztve with s'aiidlsteam-flowommutifeati'on means .ciudes' a, main :passageextendmgL-thifoughthe 8 joint connection. to said mai-n cover', saidv second coverupomremovalof said auxiliary body therefrom; to close and seal the'opening therethrough.

PETER ANTONIOLI, JR.

andfmanipuiatable .to operi-andiciosethe letter, Y5

ANDREW JOHNSON.

. 2. A portable cooking utensil'v of theipressure cooker, type.according to 'eiaim l, wheifemltie l h ineens to providesteamfowcommuncaztionim- Refrenes Cited 1n the `lle 0f 12h15 PatentUNITED STATES PATENTS movementto eirose. or open position.

-oookeiftypeaxceor'ding to claim i; `nchrciing means Number Country Datetof` removably couple' saidauxiliary'body in sealed 25 501,822 GermanyJuly', 8, l1930

